Piotr is a hydrologist. Maybe even a wetland hydrologist. He likes to get his feet wet and measure water in swamps for a living. But he is to do this no more. Piotr has discovered joys of juggling climate data, of Python, R, ssh, vim and qsub. Thus he is here, at CSAG. Using climate models’ output for hydrological analyses in the context of climate change impact assessment, attribution and seasonal forecasting. Trying to figure out how the uncertainties and errors propagate through the various processing steps, and how to extract useful information out of this somewhat messy business. Bridging surprisingly disparate worlds of climate and hydrological modellers.